Perry R. Koseff, DO
Family Medicine Physician · Long Beach, CA
Perry R. Koseff, DO is a family medicine physician with a practice address in Long Beach, California, and NPI 1790709186, issued on Jul 27, 2006. Check the license (California 20A4371, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Perry R. Koseff
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A4371 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Redondo Ave, Long Beach, CA 90814
- Phone
- (562) 439-6966
- Enumerated
- Jul 27, 2006
- Record last updated
- Sep 7, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 300 Redondo Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Judith Belman, NPNurse Practitioner1093894750
- Deborah Chow, NPNurse Practitioner1710991757
- Tyler De Jong, M.D.Internal Medicine Physician1033537493
- Clayton Dejong, MDInternal Medicine Physician1467466409
- Stephanie Green, MDFamily Medicine Physician1427062462
- Lyndsay Onaga, PA-CPhysician Assistant1912770579
Verify Perry R. Koseff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A4371Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family medicine physician in 2024
55 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Perry R. Koseff among 17,133 family medicine physician records in California
Perry R. Koseff, DO is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
213 family medicine physician records list a practice address in Long Beach
They are 213 of the 13,650 NPPES records with a practice address in Long Beach, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Long Beach → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Stephanie Green, MDLong Beach, CA 908141427062462
- Kristine Armosilla, FNPLong Beach, CA 908131336608777
- Tuong Bui, MDLong Beach, CA 908151841251659
- Carlos Calderon, MDLong Beach, CA 908131346820610
- Robert Cohen, M.D.Long Beach, CA 908151588615553
- Vu Cung, MDLong Beach, CA 908131831273580
- Masoomeh Djodeir, MDLong Beach, CA 908151568442986
- Pujitha Egodage, M.D.Long Beach, CA 908131942401625
Common questions
What is Perry R. Koseff, DO's NPI number?
Perry R. Koseff, DO's National Provider Identifier (NPI) is 1790709186, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Perry R. Koseff, DO located?
The NPPES record lists a practice address at 300 Redondo Ave, Long Beach, CA, 90814. Phone: (562) 439-6966. Providers update this record themselves, so call before visiting.
How can I verify Perry R. Koseff, DO's license?
NPPES lists California license number 20A4371, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Perry R. Koseff, DO prescribe under Medicare Part D?
In 2024, Perry R. Koseff, DO had 55 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.